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I have thought that these outline* of our rarer young flat-fishes as also of the 

 Greenland halibut will not be without some interest to those naturalists who at some 

 later period might try to look for the still missing stages, as they will facilitate 

 the determination of the species that might be found; and I seize the opportunity 

 to thank Professor Ohr. Liitken in Copenhagen and Professor B. Collet/ in Christiania 

 for having so readily placed the collections of their museums at my disposal on 

 this occasion. 



I have in the shallow, sandy, Danish seas been able only to find young ones 

 of plaice, jloiiiitliT. common <l<tl>. sole, turbot, mid brill, and must suppose therefore 

 that the fry of the other species which are common in our seas as grmon-up fish, 

 must live on more or less deep water; these missing species have also, although 

 in but small numbers, been taken in the deep Norwegian and Greenland 

 fjords; viz. : 



Hippoglossus vulgaris at Norway. 

 Hippoglossus hippoglossoides at Greenland. 

 Hippoglossoides platessoides at Norway and Greenland. 

 Pleuronectes cynoglossus & PI. microcephalus at Norway. 



That the little rare species of Zeugopterus, as also Arnoglossus, have been 

 taken only in small specimens on the shores of Norway, is perhaps rather owing 

 to the indefatigable activity of Prof. G. 0. Sars with the dredge there, than to 

 their absence from the Cattegat properly so called. 



Note: The numbers I & II of the plates have by a mistake sometimes been inter- 

 changed. 



